結果 : is plan b a type of birth control

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2:46

The Science of 'Plan B' - Emergency Contraception

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"Plan B" morning-after pill access expanded to teens

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Nurse Practitioner explains the EMERGENCY CONTRACEPTIVE PILL-AKA Plan B: How does it work??

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Yes, Plan B doesn't work during ovulation. Here's why

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Plan B: Is It Contraception or Not?

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Fact or Fiction: Pregnancy tests contain the Plan B pill?

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Some Researchers Say A Woman’s Weight Could Make The Emergency Contraceptive Pill ‘Plan B” Less Effe

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Plan B pill goes over the counter

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